不同病程髌股关节痛患者跑步地面反作用力特征的支持向量机分析  

Support Vector Machine Analysis on Ground Reaction Force Characteristics of Patients with Patellofemoral Pain in Different Disease Courses

作　　者：史鹏程 李翰君[1] 时会娟 SHI Pengcheng;LI Hanjun;SHI Huijuan(School of Sport Science,Key Laboratory for Performance Training&Recovery of General Administration of Sport,Beijing Sport University,Beijing 100084,China;Key Laboratory of Exercise Rehabilitation Science of Ministry of Education,Beijing Sport University,Beijing 100084,China)

机构地区：[1]北京体育大学运动人体科学学院,国家体育总局体能训练与身体机能恢复实验室,北京100084 [2]北京体育大学运动康复科学教育部重点实验室,北京100084

出　　处：《医用生物力学》2025年第2期284-290,共7页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(32401090);中央高校基本科研业务费专项资金(2024TNJN006)。

摘　　要：目的通过支持向量机(support vector machine,SVM)分类器和特征选择方法探究髌股关节痛(patellofemoral pain,PFP)患者跑步中的动力学特征,为PFP的预防与康复提供理论支持。方法使用SVM分类模型,根据受试者跑步的动力学特征对健康人(n=13)、PFP长病程患者(n=13)和PFP短病程患者(n=10)进行分类分析。通过特征选择方法筛选出对分类最有效的最小特征集。结果构建的分类模型准确率达83.3%。筛选到的最小特征集中包含3个关键特征,其中PFP短病程患者表现为冲击谷值和主动峰值出现时间的延迟,而PFP长病程患者则表现为冲击峰-冲击谷斜率较低。结论PFP短病程患者的主要表现是缓冲过程延长和蹬伸动作延迟,PFP长病程患者最主要的表现是垂直反作用力冲击峰-冲击谷斜率较低。这些特征揭示了PFP在不同病程的特异性特征,为制定个性化的康复方案提供依据。Objective To investigate the dynamic features of patients with patellofemoral pain(PFP)during running by using support vector machine(SVM)classifier and feature selection method,so as to provide a theoretical support for the prevention and rehabilitation of PFP.Methods An SVM classification model was used to classify healthy individuals(n=13),PFP patients with long-term disease course(n=13),and PFP patients with short-term disease course(n=10)based on their dynamic features during running.The most effective minimum feature set was selected through feature selection method.Results The accuracy rate of the constructed classification model was 83.3%.The minimum feature set selected contained 3 key features.PFP patients with short-term disease course showed a delay in the appearance of impact valleys and active peaks,284 while PFP patients with long-term disease course showed a lower impact peak-valley slope.Conclusions PFP patients with short-term disease course mainly showed a prolonged shock absorption process and a delayed propulsion action,while PFP patients with long-term disease course showed the most significant feature of having a lower vertical reaction force impact peak-valley slope.These features revealed the specific characteristics of PFP at different stages of the disease,providing a basis for developing individualized rehabilitation programs.

关 键 词：髌股关节痛 跑步 支持向量机 特征选择 生物力学 

分 类 号：R318.01[医药卫生—生物医学工程]